NPR-5 Series
Thermosetting Solder Mask
NPR-5 is thermosetting solder mask (2-component type) which is consisted of epoxy resin.
It is suitable for FPC. NPR-5 has excellent flexibility which allows 180℃ bending and enable to maintain the flatness of FPC.
In addition, the exposure and developing process are not required then it contributes to cost down.
Features
- Excellent flexibility which allows 180℃ bending and spring back is small.
- Exposure and developing process are not required then it contributes to cost down.
- Halogen free and RoHS compliant.
- Excellent flexibility.
- Almost no warpage occurs after curing.
Properties
| Item | Representative value | Test condition |
|---|---|---|
| Flexibility | No Crack | 25um PI film, Angle 180deg., Pressure 50N |
| Pencil hardness | HB | JIS K 5600 |
| Adhesion | Class 0 | JIS K 5600 |
| Warpage | < 1mm | 25um PI film, Single side coat |
| Heat resistance to solder | > 1cycle | Pb free solder paste, Reflow peak temp. 260deg.C, 30sec. |
| Resistance to electroless Ni/Au Plating | PASS | Ni 3um / Au 0.08um thickness |
| Resistance to electrolytic Ni/Au plating | PASS | Ni 3um / Au 0.1um thickness |
| Resistance to acid | PASS | 10% HCl aq., 25deg.C, 30min. Dipping |
| Resistance to alkaline | PASS | 5% NaOH aq., 25deg.C, 30min. Dipping |
| Resistance to organic solvent | PASS | IPA, 25deg.C, 30min. Dipping |
Products
| Name | Color | Features | Halogen Free |
|---|---|---|---|
| BR-HF No.13 | Brown | Excellent flexibility, Small spring back | < 300ppm |
| LFBR | Brown | Long shelf life | < 300ppm |